Top rail spacer



FIG. 1 is a perspective view of a top rail spacer, in accordance with my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front side elevational view thereof; and,

FIG. 7 is a back side elevational view thereof.

The broken lines in the drawings depict portions of the top rail spacer that form no part of the claimed design. 

CLAIM The ornamental design for a top rail spacer, substantially as shown and described. 